Circular flows are generally used to depict the steps in virtuous and vicious cycles.These are processes that begin and end back at the beginning, creating a continuous cycle.This circular flow has input from a single source that may or may not to be part of the cycle.
Use this framework to show a progression that feeds back into itself and begins again, with input from outside the cycle.
See CF011 as an alternative: the last circular segment feeds into the horizontal inflow; it is not part of it. See the tutorial for more information on usage and formatting.